Rubber heel.



narran srairns narnia-fr. enrichi.

FREDERICK J', GLEASON, GF WLPLE, llfLASSACI-USEIJS,l ASSIGNB T0 STANDAD i WOVEN "FABRC COMPANY, OF FRAMINGHAM, lVIASVSACI-I'USETTS,A A CORPORATION or MASSACHUSETTS.

nissart'- RUBBER HEEL.

Specification of Letters IP atent.

Patented June'ZO. 'im o- Application filed Apr123, 1915. Serial No. 23,490.

Beit known that l, Freimaurer; J. GrinnsoN, a citizen of the l'nitcd tates, residn ing at llalpole, in thecounty of Norfolk and State of lllassachusetts, have invented -certain ,new and useful Improvements` in Rubber Heels, of which the following 'description, in connection with the' accompanying drawings, is a specification,like

reference characters oirthe drawings indi eating like parts in the several figures.

This invention relates to rubber heels and soles andl other articles made of rubber (hereinafter, 'for convenience, referred to as heels) and particularly to the friction plugs, or inserts, which ,new are commonly used in"rubber heels, and to some extent inv other articles.

VIt his been proposed heretofore to use some' friction metal, such for instance aS lead, in plugs of this character but no satisfactory way has ever been fouiid,slo far as I am aware, of causing the metal to adhere to or -bond with the other parts of 'the plug. Consequently, in manufacturing heels hav# ing plugs .containing metal inserts it has been necessary to rely 'upon some 'inecliani cal construction to lockthe metal parts 1n -the plug; but these constructions have proved unsatisfactori7 for the reason that the metal parts become loosi-aA and drop out of the heel when it has been worn for only a relatively short time. The lpresent in'- ventioii has for an objectA the construction of a. heel having a plug containing friction metal but in which the metal will be bonded to the adjacent parts of the heel.,A lThe invention also is directed to the provision of a novel construction of friction plug which may be advantagecasl",7 used either with or Without a friction metal, and which can be used generally in rubber articles in which a friction plug is desirable. l

A convenient embodiment of the invention will now be described, reference being made rto the accompanying drawings, in Whichl Figure l is a 'View of the tread face of a heel constructed in accordance with this invention; Fig. 2 is a cross-sectional View on the line 2-2, Fig. l; and Fig. 3 is a perprises a body 3 having a friction plug con-,.

sisting, of a core 4: and a jacket 5 for the as lead, and strands or strips ofsome textile material, ssuch asl cotton, all these n strands being twisted tightly together to form a vrope of the cross-sectional dimensions required for the core 4. Preferablythe rope is so twisted that the strands have a very sharp pitch. The rope is then wrapped tightly in awfabric suoli as duck cr canvas to form the jacket 5 and the strip of mate The coie is made up of strands or l strips of friction metal 6, such lfor instance' y rial ina-deup in this manner is cutl .transl versely into pieces to form plugs of the re# `quired length., These plugsmay-'then be flattened out if` desired to give them the oval cross section shownin Fig. 1.

I In the usual method of manufacture, the materials of which the core and jacket are made are treated with a rubber cement, or

compound, before being assembled so that .all the parts of thelieel will bondtogether vduring the vulcanizing operation. As previously stated, difficulty has'been experienced in makingthe metal parts adhere to the adjacent parts oftheheel; but I have found that if the s t ands or strips of leadv or other metal used for 'this purpose are first coated with copper, eitherby electro-plating or otherwise, the copper reacts cheinicallyduring the vulcanizing operation With the adjacent Aparts of the heel to forni a firm union or bond with these parts. In Fig. 3 the copper coating ontlie strands of lead G is indicated at 8. By this means, Tt am enabled to maken. heel having a plug con'- taining parts/of friction metal and to effectually bond these metal parts to the other arts of the heel, thus overcoming the difcultyf that heretofore has prevented the satisfactory use of friction metal in rubber Preferably the Varea 4of metal exposed'to i material ofthe core exposed on, this surface.

cui

Lad:

f area of the jacket about equal to the cross Sectional area of the body of the plug. 'lllie metal, of course, is Wornaivay byabrasion faster than the textile parts o1Ll the plug 1out the latter parts of the heel resist wear some'n what loetter than the'rubber bodyoi the heel. By proportioniougthe parts in sultstantially the manner described, an ap proximately uniform wearing surface is provided since the textile materials in 'the core and the jacket protect the'ends of the metal strands 'from being gouged out or Worn away materially faster than the surface of the rest of the plum The plug prein erably is inserted in the heel so that its axis lies substantially perpendicular to the tread t face of the heel. 'lhe strands composing the core of the plug thus are caused to entend transversely to the tread face oi'; the heel so that the weer on the core cornes on the ends of the strands. y

The construction 'of plug shown is advann tageous Whether or notv metal strands are used in the composition of the core since 'the twisting ci the core in the manner described serves to interlock mechanically all the strands of the core with each other and the tight Wrapping or these strandsin the iaclret 5 binds them togetherv and prevents the strands around theedges ofthe core from becoming frayed out or torn away during the Wear of the heel. A

I consider it preferable to use the friction metal in strip torni {althougli not rec-v essarily in the specic iornr shown) rather than in the form or a large plug so as to present at the tread :lace of the plug a ifriction'surface in which thernetal and tex'- tile materials are Wclldistriliuted; 'and also for the purpose of rendering the inetalpieces less liable to displacement While the article is inuse. lty is obvious that the invention may take many forms and be used in many kinds of rubber articles vWhere its Jfriction or antislipping characteristics are desired, without departing :troni the spirit or scope" ci? this invention.

l believe it to be new `with nie to use, in a rubber article, a friction member contain# ing metallic and non-metallicparts, the me@ tallic part or parts being bonded to the parts adjacent thereto through the use of copper.

ln my companion application. Serial No. 69,611.9, liled November 20, 1915, for iin-T proveniente in rubber articles, l have dis-' closed a construct-ion that is in some respects an improvement on the construction dis closed in the present application. klhe claims broad enough to cover vboth constructions are presented in the present' application, and the claims of the later case limited to sulaject-inatter'not disclosed in the present application.

alsace-i l said core.

A. rubber heel having a friction plug vulcanized therein, said plug comprising a core consisting oli strands of friction material extending transversely to the tread face ol the heel. and jacket ci fabric around said core.

3. A rubber heel having a friction plug 'vulcanized therein, said plug comprising a core consisting of strands of friction material twisted together and extending diagonallyto the tread face of the heel and layers olf fabric encircling said core and bind ing said strands together, saicllayers or" fabric extending; substantially perpendicular 4to the tread "lisce of the lieel.

l A rubber heel having a friction plug vulcanized therein, said plugcomprising strands or tex. le material and friction metal twisted together to form a core, and fabric Wound around said core..

A. rubber heel having a friction plug vulcanized therein, said plug including Sil strands of textile material and friction metal extending transversely ci the tread lace of the plug, and said instal strands losing loondcrlto the adjacent oi the heel.

6. A. rubber article having' a tread face7 and a friction member vulcanized in said article and exposed to wear at said face, saifineinloer includingx strips ot' metallic and non-metallic materials interlocked with lili;

each other, and said metallic material includinglead and having a coating or' copper.,

7. A rubber article having a tread. face, and a friction plug vulcanized in said article and exposed to Wear at said face, said v plug comprising strips oli textile material and friction metal coated with copper, said strips vbeing mechanically interlocked with each other.

f 8. A. rubber article, having a friction. inemthercin comprising@ textile material and friction metal, said material and metal loe` in the form ci strips bound together. Skil rubber heel having a :friction plug vulcanized therein, said plug including strands ot textile material and "friction metal twisted together to forni a core and .layers oli fabric wound around said core, said metal strands being bonded to the ad 'jacent 'parte olf the plug..

l0. il'. rubber heel havinfy a friction lue .1 e e vulcanized therein, saio. plug consisting ol strands of 1 `aston and lead coatedvvitli cop per twisted tightly together to form a core and eottonabric wound aroundV saideore In testimony'whereofl I hate ai'lxed lny in a plraltn) of layerls. h f signature, in presence ai three Witnesses@`4 l1. ru er artce avng ai riction meuuloer therein comprising friction metal FREDERICK J GLEASON' and textile material, both in -strp form, Witnesses:

lying transversely to vthe face of the artiele ARTHUR H. BURDICK, exposed to wear andbonded to the adja- RICHARD D. NORTHROP,

cent parts of the article. MELROSE D. DAvms. 

